Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f15e7472a09b5b2…

MALICIOUS

PDF

73.8 KB Created: 2021-09-03 22:07:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1dd8e7e4675fd1a1fa30a4465c2784e8 SHA-1: 6cce131f02a0923e12f8fb6b77d5a49a969aca0e SHA-256: 6f15e7472a09b5b2188f3c21bc439630a47e189506cbd2a9e1562a39ff9db863
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains numerous links pointing to potentially compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and link farm indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://drafthe.ru/uplcv?utm_term=expressing+obligation+worksheet PDF link annotation
    • http://rgn2u.com/userfiles/files/28013893960.pdfIn PDF document text
    • http://www.moyekolodin.com/files/batutivaletakavizuxinik.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/cbe7e47d13ffeed135f5734975256735/bewidatatevibabi.pdfIn PDF document text
    • https://mama-light.net/business_school/uploads/file/ruxemawetexan.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/23739566739.pdfIn PDF document text
    • http://ketoanantamhcm.com/uploads/files/45334919235.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/0612fb95ce83938505b203ab56f12cc2/9642717093.pdfIn PDF document text
    • https://galedo.cz/www/data/cms_files/files/kanomuzegopaguzifonariva.pdfIn PDF document text
    • http://haai.org/upload/file/19506033473.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/26939450319.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/71832334054.pdfIn PDF document text
    • http://ordinate-ltd.com/file_media/file_image/file/siwes.pdfIn PDF document text
    • https://sieuthimaytinhcu.vn/upload/files/mafipinejaz.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/qp6mt5k71k9m0arcn4viitfvk3/noderumaremitabosadu.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/lulifagezenanoton.pdfIn PDF document text
    • http://icloudcleaners.com/uploads/account/autoresponderfiles/woremexaxazupugaguf.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a835fdbbee9---79751567881.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/06110aae908d4be9ac4af230f66c213b/47571466534.pdfIn PDF document text
    • http://ilovehikari.com/uploads/files/66966775765.pdfIn PDF document text
    • http://condosworld.com/abisol1/userfiles/files/40627097610.pdfIn PDF document text
    • http://lawrence-spruill.com/clients/42275/File/40440113336.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/12646352651.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdcf2c5a106---234003309.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e65da6f38c5---kofidugomavanolinupewik.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c67d794fbed---dapinukesunuseda.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD373 17332 bytes
SHA-256: 89ef7c4b442402227f7a95b0c06904cd7516583363614b0ff59faee01d274e80
font_02_sfnt_off0000ffe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE0 10932 bytes
SHA-256: da243e6d20a15a5fff01918beb1cf325a149f9f89515cfd69174a204ae19ce95

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